Pneumatic tire.



R.'J. WYNN.

PNEUMATIG TIRE.

APPLIUATION FILED rms. 10,1912.

www@ July 29, 1913.

@9i/buceo@ ROBERT J. WYNN, OF SAULT STE. MARIE, MICHIGAN.

`PNETJMATIC TIRE.

Specicationof I-.etters Patent.

Patented July aa, 1913.

A pplicatlon filed February 10, 1912. Flerial No. 676,757.

To all 'whom 'it may concern: Be it known that I, Ronu'r J. W'YNN, citizen of the United States, residing at SaultSte. Marie, -in the county of Chippewa a and State of Michigan, have invented certain new and useful .Improvements in Pneumatic Tires, of' which the following is a specification.

This invention relates to pneumatic t1res 1D for automobiles and like vehicles, and has for one of its objects to provide a simply constructed device formed of a plurality of separable. parts so that in event of breakage or impairment, one part may be detached without discarding the remaining parts.

Another object of the invention is to provide a simply constructed device whereby the inner expansible tube may be readily detached without removing the tire wholly from the rim.

Another object 'of the' invention is to provide a simply constructed device so arranged and constructed that the parts coact to mutually support each other and preventdeflection when strains are applied either radially or transversely.

With these and other objects in view, the

invention consists incertain novel features of construction as hereafter. shown and described, and then specifically pointed outpin the claim, and inthe drawings illustrative of the preferred embodiment of the invention: Figure 1 is a side elevation of a wheel' with the improved tire` applied and partly in section; Fig. 2 is a transverse section enlarged on the line 2 2 of Fig. 1.-

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters. v

Theimproved tire may be applied without material structural change to any of the various forms of automobile wheel fellies and rims, but for the purpose of illustration is shown applied to a conventional wheel including the hub 10, spokes 11, felly 12'and main rim `13, the latter having the inturned clencher flanges 14'of the usual form.

The body of the tire is formed of four separate portions, two main side portions 15 16, an outer orl tread portion 17, and a supplemental or outer clencher rim 18, the latter having inturned clencher flanges 19-20, as shown. The tread portion 17 bears around the outer faces of the clencher flanges 19 of the supplemental rim and is vulcanized thereto. The side member 15 of the tire is formed with an inwardly directed outer portion 21 which conforms to and engages within the clencher rim 19, as shown at 22, while theside member 16 is inwardly directed at its outer ortion as shown at 23, and with an inward y directed terminal 2a engaging within the clencher flange 20. At its inner end the side member 15 is provided with a clencher flange 25 engaging one of the flanges 14` of thel main clencher rim, while the side member 16 is provided with a clench flange 26 engaging the other flange of the main clencher rim. The inner tube is represented at 27, and'conforms to theV interior of the members 15-16 and 18, as shown.` At their outer ends the members 15-16 are lflattened as shown at 28-29 while the innerends of the tread member 17 are correspondingly flattened as shown at 30-31, the Hattened surfaces extending in parallel relations to the rims 13 and 18 and coacting to mutually support the members and prevent separation thereof under the severe strains to which they will be subjected when in use. It will be noted also that the inwardly directed portions 21-23 of the side members of the tire materially enlarge and strengthen them at the points where the greatest strains occur and' coact with the flattened 'faces to still further increasel the efficiency and utility. By this simple means it will be obvious that a three-part tire is produced vwith the adjacent edges united by the clencher flanges of the member 18, and two of the tire memaov bers united in the ordinary manner to the main'clencher rim 13. The members 15- -16--1( will be constructed of the usual mathe same time materiau;7 decreases the expense of the renewal of worn or impaired tires. The tread portion 17 receiving the greatest wear maybe renewed at comparatively small expense, while the side portions 15-16 which do not generally'receive heavy abrasion or wear, will outlast a number of the tread portions.

The improved tire may be constructed of I The expense of renewing the tire 1s therefore materiallyl decreased.

uny'rrequired size to fit wheels of different forms and sizes` may be employed either in the single tread wheels such-'as are commonly employed upon automobiles, but is likewise adapted without material structural change to the twin tires of autov trucks and likepheavy vehicles. The parts 15-16 are precisely alikeand are therefore inter'- changeable.

`Hav-ing thus described the invention, whatl 1s claimed as new 1s:

A tire comprising side sections provided with stepped edges formed with plane sur- 'v faces, the lower surfaces of the sections beingy in alinement with each other, and the upper surfaces of thesections being in alinement with each other, said upper and lower surfaces being disposedin parallel relation, the portions of the sections between the copies or this patent may be obtained for stepped edges being curved inwardly adjacent the lower surfaces and outwardly adjacent the upper surfaces, and a tread section formed wit-h stepped plane surfaces disposed to contact. with the stepped plane surfaces of the side sections, a fiat member sup- In testimony whereof I 'aiix my signature l in presence of two witnesses.

ROBERT J VVYNN. [L s.] lVitnesses:

FRANK P. SULLIVAN, H. B. yMcMAHoN. 4

ve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

